Simplified polynomial-expansion linear detectors for DS-CDMA systems

The multistage linear receiver of Moshavi et al. (1996) was designed to approximate the decorrelating detector and the MMSE detector without calculating the inverse of the cross-correlation matrix R of the spreading codes directly. However, it is complicated by the need to calculate a set of weights using a procedure involving the inverting of a large matrix. A modified structure is proposed to accomplish the same task without the need for computationally intensive procedures such as matrix inversion